<?php
/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2013 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 * @category   PHPExcel
 * @package    PHPExcel_Worksheet
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version    1.7.9, 2013-06-02
 */


/**
 * PHPExcel_Worksheet_PageSetup
 *
 * <code>
 * Paper size taken from Office Open XML Part 4 - Markup Language Reference, page 1988:
 *
 * 1 = Letter paper (8.5 in. by 11 in.)
 * 2 = Letter small paper (8.5 in. by 11 in.)
 * 3 = Tabloid paper (11 in. by 17 in.)
 * 4 = Ledger paper (17 in. by 11 in.)
 * 5 = Legal paper (8.5 in. by 14 in.)
 * 6 = Statement paper (5.5 in. by 8.5 in.)
 * 7 = Executive paper (7.25 in. by 10.5 in.)
 * 8 = A3 paper (297 mm by 420 mm)
 * 9 = A4 paper (210 mm by 297 mm)
 * 10 = A4 small paper (210 mm by 297 mm)
 * 11 = A5 paper (148 mm by 210 mm)
 * 12 = B4 paper (250 mm by 353 mm)
 * 13 = B5 paper (176 mm by 250 mm)
 * 14 = Folio paper (8.5 in. by 13 in.)
 * 15 = Quarto paper (215 mm by 275 mm)
 * 16 = Standard paper (10 in. by 14 in.)
 * 17 = Standard paper (11 in. by 17 in.)
 * 18 = Note paper (8.5 in. by 11 in.)
 * 19 = #9 envelope (3.875 in. by 8.875 in.)
 * 20 = #10 envelope (4.125 in. by 9.5 in.)
 * 21 = #11 envelope (4.5 in. by 10.375 in.)
 * 22 = #12 envelope (4.75 in. by 11 in.)
 * 23 = #14 envelope (5 in. by 11.5 in.)
 * 24 = C paper (17 in. by 22 in.)
 * 25 = D paper (22 in. by 34 in.)
 * 26 = E paper (34 in. by 44 in.)
 * 27 = DL envelope (110 mm by 220 mm)
 * 28 = C5 envelope (162 mm by 229 mm)
 * 29 = C3 envelope (324 mm by 458 mm)
 * 30 = C4 envelope (229 mm by 324 mm)
 * 31 = C6 envelope (114 mm by 162 mm)
 * 32 = C65 envelope (114 mm by 229 mm)
 * 33 = B4 envelope (250 mm by 353 mm)
 * 34 = B5 envelope (176 mm by 250 mm)
 * 35 = B6 envelope (176 mm by 125 mm)
 * 36 = Italy envelope (110 mm by 230 mm)
 * 37 = Monarch envelope (3.875 in. by 7.5 in.).
 * 38 = 6 3/4 envelope (3.625 in. by 6.5 in.)
 * 39 = US standard fanfold (14.875 in. by 11 in.)
 * 40 = German standard fanfold (8.5 in. by 12 in.)
 * 41 = German legal fanfold (8.5 in. by 13 in.)
 * 42 = ISO B4 (250 mm by 353 mm)
 * 43 = Japanese double postcard (200 mm by 148 mm)
 * 44 = Standard paper (9 in. by 11 in.)
 * 45 = Standard paper (10 in. by 11 in.)
 * 46 = Standard paper (15 in. by 11 in.)
 * 47 = Invite envelope (220 mm by 220 mm)
 * 50 = Letter extra paper (9.275 in. by 12 in.)
 * 51 = Legal extra paper (9.275 in. by 15 in.)
 * 52 = Tabloid extra paper (11.69 in. by 18 in.)
 * 53 = A4 extra paper (236 mm by 322 mm)
 * 54 = Letter transverse paper (8.275 in. by 11 in.)
 * 55 = A4 transverse paper (210 mm by 297 mm)
 * 56 = Letter extra transverse paper (9.275 in. by 12 in.)
 * 57 = SuperA/SuperA/A4 paper (227 mm by 356 mm)
 * 58 = SuperB/SuperB/A3 paper (305 mm by 487 mm)
 * 59 = Letter plus paper (8.5 in. by 12.69 in.)
 * 60 = A4 plus paper (210 mm by 330 mm)
 * 61 = A5 transverse paper (148 mm by 210 mm)
 * 62 = JIS B5 transverse paper (182 mm by 257 mm)
 * 63 = A3 extra paper (322 mm by 445 mm)
 * 64 = A5 extra paper (174 mm by 235 mm)
 * 65 = ISO B5 extra paper (201 mm by 276 mm)
 * 66 = A2 paper (420 mm by 594 mm)
 * 67 = A3 transverse paper (297 mm by 420 mm)
 * 68 = A3 extra transverse paper (322 mm by 445 mm)
 * </code>
 *
 * @category   PHPExcel
 * @package    PHPExcel_Worksheet
 * @copyright  Copyright (c) 2006 - 2013 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Worksheet_PageSetup {
	/* Paper size */
	const PAPERSIZE_LETTER = 1;
	const PAPERSIZE_LETTER_SMALL = 2;
	const PAPERSIZE_TABLOID = 3;
	const PAPERSIZE_LEDGER = 4;
	const PAPERSIZE_LEGAL = 5;
	const PAPERSIZE_STATEMENT = 6;
	const PAPERSIZE_EXECUTIVE = 7;
	const PAPERSIZE_A3 = 8;
	const PAPERSIZE_A4 = 9;
	const PAPERSIZE_A4_SMALL = 10;
	const PAPERSIZE_A5 = 11;
	const PAPERSIZE_B4 = 12;
	const PAPERSIZE_B5 = 13;
	const PAPERSIZE_FOLIO = 14;
	const PAPERSIZE_QUARTO = 15;
	const PAPERSIZE_STANDARD_1 = 16;
	const PAPERSIZE_STANDARD_2 = 17;
	const PAPERSIZE_NOTE = 18;
	const PAPERSIZE_NO9_ENVELOPE = 19;
	const PAPERSIZE_NO10_ENVELOPE = 20;
	const PAPERSIZE_NO11_ENVELOPE = 21;
	const PAPERSIZE_NO12_ENVELOPE = 22;
	const PAPERSIZE_NO14_ENVELOPE = 23;
	const PAPERSIZE_C = 24;
	const PAPERSIZE_D = 25;
	const PAPERSIZE_E = 26;
	const PAPERSIZE_DL_ENVELOPE = 27;
	const PAPERSIZE_C5_ENVELOPE = 28;
	const PAPERSIZE_C3_ENVELOPE = 29;
	const PAPERSIZE_C4_ENVELOPE = 30;
	const PAPERSIZE_C6_ENVELOPE = 31;
	const PAPERSIZE_C65_ENVELOPE = 32;
	const PAPERSIZE_B4_ENVELOPE = 33;
	const PAPERSIZE_B5_ENVELOPE = 34;
	const PAPERSIZE_B6_ENVELOPE = 35;
	const PAPERSIZE_ITALY_ENVELOPE = 36;
	const PAPERSIZE_MONARCH_ENVELOPE = 37;
	const PAPERSIZE_6_3_4_ENVELOPE = 38;
	const PAPERSIZE_US_STANDARD_FANFOLD = 39;
	const PAPERSIZE_GERMAN_STANDARD_FANFOLD = 40;
	const PAPERSIZE_GERMAN_LEGAL_FANFOLD = 41;
	const PAPERSIZE_ISO_B4 = 42;
	const PAPERSIZE_JAPANESE_DOUBLE_POSTCARD = 43;
	const PAPERSIZE_STANDARD_PAPER_1 = 44;
	const PAPERSIZE_STANDARD_PAPER_2 = 45;
	const PAPERSIZE_STANDARD_PAPER_3 = 46;
	const PAPERSIZE_INVITE_ENVELOPE = 47;
	const PAPERSIZE_LETTER_EXTRA_PAPER = 48;
	const PAPERSIZE_LEGAL_EXTRA_PAPER = 49;
	const PAPERSIZE_TABLOID_EXTRA_PAPER = 50;
	const PAPERSIZE_A4_EXTRA_PAPER = 51;
	const PAPERSIZE_LETTER_TRANSVERSE_PAPER = 52;
	const PAPERSIZE_A4_TRANSVERSE_PAPER = 53;
	const PAPERSIZE_LETTER_EXTRA_TRANSVERSE_PAPER = 54;
	const PAPERSIZE_SUPERA_SUPERA_A4_PAPER = 55;
	const PAPERSIZE_SUPERB_SUPERB_A3_PAPER = 56;
	const PAPERSIZE_LETTER_PLUS_PAPER = 57;
	const PAPERSIZE_A4_PLUS_PAPER = 58;
	const PAPERSIZE_A5_TRANSVERSE_PAPER = 59;
	const PAPERSIZE_JIS_B5_TRANSVERSE_PAPER = 60;
	const PAPERSIZE_A3_EXTRA_PAPER = 61;
	const PAPERSIZE_A5_EXTRA_PAPER = 62;
	const PAPERSIZE_ISO_B5_EXTRA_PAPER = 63;
	const PAPERSIZE_A2_PAPER = 64;
	const PAPERSIZE_A3_TRANSVERSE_PAPER = 65;
	const PAPERSIZE_A3_EXTRA_TRANSVERSE_PAPER = 66;

	/* Page orientation */
	const ORIENTATION_DEFAULT = 'default';
	const ORIENTATION_LANDSCAPE = 'landscape';
	const ORIENTATION_PORTRAIT = 'portrait';

	/* Print Range Set Method */
	const SETPRINTRANGE_OVERWRITE = 'O';
	const SETPRINTRANGE_INSERT = 'I';


	/**
	 * Paper size
	 *
	 * @var int
	 */
	private $_paperSize = PHPExcel_Worksheet_PageSetup::PAPERSIZE_LETTER;

	/**
	 * Orientation
	 *
	 * @var string
	 */
	private $_orientation = PHPExcel_Worksheet_PageSetup::ORIENTATION_DEFAULT;

	/**
	 * Scale (Print Scale)
	 *
	 * Print scaling. Valid values range from 10 to 400
	 * This setting is overridden when fitToWidth and/or fitToHeight are in use
	 *
	 * @var int?
	 */
	private $_scale = 100;

	/**
	 * Fit To Page
	 * Whether scale or fitToWith / fitToHeight applies
	 *
	 * @var boolean
	 */
	private $_fitToPage = false;

	/**
	 * Fit To Height
	 * Number of vertical pages to fit on
	 *
	 * @var int?
	 */
	private $_fitToHeight = 1;

	/**
	 * Fit To Width
	 * Number of horizontal pages to fit on
	 *
	 * @var int?
	 */
	private $_fitToWidth = 1;

	/**
	 * Columns to repeat at left
	 *
	 * @var array Containing start column and end column, empty array if option unset
	 */
	private $_columnsToRepeatAtLeft = array('', '');

	/**
	 * Rows to repeat at top
	 *
	 * @var array Containing start row number and end row number, empty array if option unset
	 */
	private $_rowsToRepeatAtTop = array(0, 0);

	/**
	 * Center page horizontally
	 *
	 * @var boolean
	 */
	private $_horizontalCentered = false;

	/**
	 * Center page vertically
	 *
	 * @var boolean
	 */
	private $_verticalCentered = false;

	/**
	 * Print area
	 *
	 * @var string
	 */
	private $_printArea = null;

	/**
	 * First page number
	 *
	 * @var int
	 */
	private $_firstPageNumber = null;

	/**
	 * Create a new PHPExcel_Worksheet_PageSetup
	 */
	public function __construct() {
	}

	/**
	 * Get Paper Size
	 *
	 * @return int
	 */
	public function getPaperSize() {
		return $this->_paperSize;
	}

	/**
	 * Set Paper Size
	 *
	 * @param int $pValue
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setPaperSize($pValue = PHPExcel_Worksheet_PageSetup::PAPERSIZE_LETTER) {
		$this->_paperSize = $pValue;

		return $this;
	}

	/**
	 * Get Orientation
	 *
	 * @return string
	 */
	public function getOrientation() {
		return $this->_orientation;
	}

	/**
	 * Set Orientation
	 *
	 * @param string $pValue
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setOrientation($pValue = PHPExcel_Worksheet_PageSetup::ORIENTATION_DEFAULT) {
		$this->_orientation = $pValue;

		return $this;
	}

	/**
	 * Get Scale
	 *
	 * @return int?
	 */
	public function getScale() {
		return $this->_scale;
	}

	/**
	 * Set Scale
	 *
	 * Print scaling. Valid values range from 10 to 400
	 * This setting is overridden when fitToWidth and/or fitToHeight are in use
	 *
	 * @param         int      ?    $pValue
	 * @param boolean $pUpdate Update fitToPage so scaling applies rather than fitToHeight / fitToWidth
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 * @throws    PHPExcel_Exception
	 */
	public function setScale($pValue = 100, $pUpdate = true) {
		// Microsoft Office Excel 2007 only allows setting a scale between 10 and 400 via the user interface,
		// but it is apparently still able to handle any scale >= 0, where 0 results in 100
		if (($pValue >= 0) || is_null($pValue))
		{
			$this->_scale = $pValue;
			if ($pUpdate)
			{
				$this->_fitToPage = false;
			}
		}
		else
		{
			throw new PHPExcel_Exception("Scale must not be negative");
		}

		return $this;
	}

	/**
	 * Get Fit To Page
	 *
	 * @return boolean
	 */
	public function getFitToPage() {
		return $this->_fitToPage;
	}

	/**
	 * Set Fit To Page
	 *
	 * @param boolean $pValue
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setFitToPage($pValue = true) {
		$this->_fitToPage = $pValue;

		return $this;
	}

	/**
	 * Get Fit To Height
	 *
	 * @return int?
	 */
	public function getFitToHeight() {
		return $this->_fitToHeight;
	}

	/**
	 * Set Fit To Height
	 *
	 * @param         int      ? $pValue
	 * @param boolean $pUpdate Update fitToPage so it applies rather than scaling
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setFitToHeight($pValue = 1, $pUpdate = true) {
		$this->_fitToHeight = $pValue;
		if ($pUpdate)
		{
			$this->_fitToPage = true;
		}

		return $this;
	}

	/**
	 * Get Fit To Width
	 *
	 * @return int?
	 */
	public function getFitToWidth() {
		return $this->_fitToWidth;
	}

	/**
	 * Set Fit To Width
	 *
	 * @param         int      ? $pValue
	 * @param boolean $pUpdate Update fitToPage so it applies rather than scaling
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setFitToWidth($pValue = 1, $pUpdate = true) {
		$this->_fitToWidth = $pValue;
		if ($pUpdate)
		{
			$this->_fitToPage = true;
		}

		return $this;
	}

	/**
	 * Is Columns to repeat at left set?
	 *
	 * @return boolean
	 */
	public function isColumnsToRepeatAtLeftSet() {
		if (is_array($this->_columnsToRepeatAtLeft))
		{
			if ($this->_columnsToRepeatAtLeft[0] != '' && $this->_columnsToRepeatAtLeft[1] != '')
			{
				return true;
			}
		}

		return false;
	}

	/**
	 * Get Columns to repeat at left
	 *
	 * @return array Containing start column and end column, empty array if option unset
	 */
	public function getColumnsToRepeatAtLeft() {
		return $this->_columnsToRepeatAtLeft;
	}

	/**
	 * Set Columns to repeat at left
	 *
	 * @param array $pValue Containing start column and end column, empty array if option unset
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setColumnsToRepeatAtLeft($pValue = null) {
		if (is_array($pValue))
		{
			$this->_columnsToRepeatAtLeft = $pValue;
		}

		return $this;
	}

	/**
	 * Set Columns to repeat at left by start and end
	 *
	 * @param string $pStart
	 * @param string $pEnd
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setColumnsToRepeatAtLeftByStartAndEnd($pStart = 'A', $pEnd = 'A') {
		$this->_columnsToRepeatAtLeft = array($pStart, $pEnd);

		return $this;
	}

	/**
	 * Is Rows to repeat at top set?
	 *
	 * @return boolean
	 */
	public function isRowsToRepeatAtTopSet() {
		if (is_array($this->_rowsToRepeatAtTop))
		{
			if ($this->_rowsToRepeatAtTop[0] != 0 && $this->_rowsToRepeatAtTop[1] != 0)
			{
				return true;
			}
		}

		return false;
	}

	/**
	 * Get Rows to repeat at top
	 *
	 * @return array Containing start column and end column, empty array if option unset
	 */
	public function getRowsToRepeatAtTop() {
		return $this->_rowsToRepeatAtTop;
	}

	/**
	 * Set Rows to repeat at top
	 *
	 * @param array $pValue Containing start column and end column, empty array if option unset
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setRowsToRepeatAtTop($pValue = null) {
		if (is_array($pValue))
		{
			$this->_rowsToRepeatAtTop = $pValue;
		}

		return $this;
	}

	/**
	 * Set Rows to repeat at top by start and end
	 *
	 * @param int $pStart
	 * @param int $pEnd
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setRowsToRepeatAtTopByStartAndEnd($pStart = 1, $pEnd = 1) {
		$this->_rowsToRepeatAtTop = array($pStart, $pEnd);

		return $this;
	}

	/**
	 * Get center page horizontally
	 *
	 * @return bool
	 */
	public function getHorizontalCentered() {
		return $this->_horizontalCentered;
	}

	/**
	 * Set center page horizontally
	 *
	 * @param bool $value
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setHorizontalCentered($value = false) {
		$this->_horizontalCentered = $value;

		return $this;
	}

	/**
	 * Get center page vertically
	 *
	 * @return bool
	 */
	public function getVerticalCentered() {
		return $this->_verticalCentered;
	}

	/**
	 * Set center page vertically
	 *
	 * @param bool $value
	 *
	 * @return PHPExcel_Worksheet_PageSetup
	 */
	public function setVerticalCentered($value = false) {
		$this->_verticalCentered = $value;

		return $this;
	}

	/**
	 *    Get print area
	 *
	 * @param    int $index       Identifier for a specific print area range if several ranges have been set
	 *                            Default behaviour, or a index value of 0, will return all ranges as a comma-separated string
	 *                            Otherwise, the specific range identified by the value of $index will be returned
	 *                            Print areas are numbered from 1
	 *
	 * @throws    PHPExcel_Exception
	 * @return    string
	 */
	public function getPrintArea($index = 0) {
		if ($index == 0)
		{
			return $this->_printArea;
		}
		$printAreas = explode(',', $this->_printArea);
		if (isset($printAreas[$index - 1]))
		{
			return $printAreas[$index - 1];
		}
		throw new PHPExcel_Exception("Requested Print Area does not exist");
	}

	/**
	 * Is print area set?
	 *
	 * @param    int $index       Identifier for a specific print area range if several ranges have been set
	 *                            Default behaviour, or an index value of 0, will identify whether any print range is set
	 *                            Otherwise, existence of the range identified by the value of $index will be returned
	 *                            Print areas are numbered from 1
	 *
	 * @return    boolean
	 */
	public function isPrintAreaSet($index = 0) {
		if ($index == 0)
		{
			return !is_null($this->_printArea);
		}
		$printAreas = explode(',', $this->_printArea);

		return isset($printAreas[$index - 1]);
	}

	/**
	 * Clear a print area
	 *
	 * @param    int $index       Identifier for a specific print area range if several ranges have been set
	 *                            Default behaviour, or an index value of 0, will clear all print ranges that are set
	 *                            Otherwise, the range identified by the value of $index will be removed from the series
	 *                            Print areas are numbered from 1
	 *
	 * @return    PHPExcel_Worksheet_PageSetup
	 */
	public function clearPrintArea($index = 0) {
		if ($index == 0)
		{
			$this->_printArea = null;
		}
		else
		{
			$printAreas = explode(',', $this->_printArea);
			if (isset($printAreas[$index - 1]))
			{
				unset($printAreas[$index - 1]);
				$this->_printArea = implode(',', $printAreas);
			}
		}

		return $this;
	}

	/**
	 * Set print area. e.g. 'A1:D10' or 'A1:D10,G5:M20'
	 *
	 * @param    string $value
	 * @param    int    $index        Identifier for a specific print area range allowing several ranges to be set
	 *                                When the method is "O"verwrite, then a positive integer index will overwrite that indexed
	 *                                entry in the print areas list; a negative index value will identify which entry to
	 *                                overwrite working bacward through the print area to the list, with the last entry as -1.
	 *                                Specifying an index value of 0, will overwrite <b>all</b> existing print ranges.
	 *                                When the method is "I"nsert, then a positive index will insert after that indexed entry in
	 *                                the print areas list, while a negative index will insert before the indexed entry.
	 *                                Specifying an index value of 0, will always append the new print range at the end of the
	 *                                list.
	 *                                Print areas are numbered from 1
	 * @param    string $method       Determines the method used when setting multiple print areas
	 *                                Default behaviour, or the "O" method, overwrites existing print area
	 *                                The "I" method, inserts the new print area before any specified index, or at the end of the list
	 *
	 * @return    PHPExcel_Worksheet_PageSetup
	 * @throws    PHPExcel_Exception
	 */
	public function setPrintArea($value, $index = 0, $method = self::SETPRINTRANGE_OVERWRITE) {
		if (strpos($value, '!') !== false)
		{
			throw new PHPExcel_Exception('Cell coordinate must not specify a worksheet.');
		}
		elseif (strpos($value, ':') === false)
		{
			throw new PHPExcel_Exception('Cell coordinate must be a range of cells.');
		}
		elseif (strpos($value, '$') !== false)
		{
			throw new PHPExcel_Exception('Cell coordinate must not be absolute.');
		}
		$value = strtoupper($value);

		if ($method == self::SETPRINTRANGE_OVERWRITE)
		{
			if ($index == 0)
			{
				$this->_printArea = $value;
			}
			else
			{
				$printAreas = explode(',', $this->_printArea);
				if ($index < 0)
				{
					$index = count($printAreas) - abs($index) + 1;
				}
				if (($index <= 0) || ($index > count($printAreas)))
				{
					throw new PHPExcel_Exception('Invalid index for setting print range.');
				}
				$printAreas[$index - 1] = $value;
				$this->_printArea = implode(',', $printAreas);
			}
		}
		elseif ($method == self::SETPRINTRANGE_INSERT)
		{
			if ($index == 0)
			{
				$this->_printArea .= ($this->_printArea == '') ? $value : ',' . $value;
			}
			else
			{
				$printAreas = explode(',', $this->_printArea);
				if ($index < 0)
				{
					$index = abs($index) - 1;
				}
				if ($index > count($printAreas))
				{
					throw new PHPExcel_Exception('Invalid index for setting print range.');
				}
				$printAreas = array_merge(array_slice($printAreas, 0, $index), array($value), array_slice($printAreas, $index));
				$this->_printArea = implode(',', $printAreas);
			}
		}
		else
		{
			throw new PHPExcel_Exception('Invalid method for setting print range.');
		}

		return $this;
	}

	/**
	 * Add a new print area (e.g. 'A1:D10' or 'A1:D10,G5:M20') to the list of print areas
	 *
	 * @param    string $value
	 * @param    int    $index        Identifier for a specific print area range allowing several ranges to be set
	 *                                A positive index will insert after that indexed entry in the print areas list, while a
	 *                                negative index will insert before the indexed entry.
	 *                                Specifying an index value of 0, will always append the new print range at the end of the
	 *                                list.
	 *                                Print areas are numbered from 1
	 *
	 * @return    PHPExcel_Worksheet_PageSetup
	 * @throws    PHPExcel_Exception
	 */
	public function addPrintArea($value, $index = -1) {
		return $this->setPrintArea($value, $index, self::SETPRINTRANGE_INSERT);
	}

	/**
	 * Set print area
	 *
	 * @param    int    $column1          Column 1
	 * @param    int    $row1             Row 1
	 * @param    int    $column2          Column 2
	 * @param    int    $row2             Row 2
	 * @param    int    $index            Identifier for a specific print area range allowing several ranges to be set
	 *                                    When the method is "O"verwrite, then a positive integer index will overwrite that indexed
	 *                                    entry in the print areas list; a negative index value will identify which entry to
	 *                                    overwrite working bacward through the print area to the list, with the last entry as -1.
	 *                                    Specifying an index value of 0, will overwrite <b>all</b> existing print ranges.
	 *                                    When the method is "I"nsert, then a positive index will insert after that indexed entry in
	 *                                    the print areas list, while a negative index will insert before the indexed entry.
	 *                                    Specifying an index value of 0, will always append the new print range at the end of the
	 *                                    list.
	 *                                    Print areas are numbered from 1
	 * @param    string $method           Determines the method used when setting multiple print areas
	 *                                    Default behaviour, or the "O" method, overwrites existing print area
	 *                                    The "I" method, inserts the new print area before any specified index, or at the end of the list
	 *
	 * @return    PHPExcel_Worksheet_PageSetup
	 * @throws    PHPExcel_Exception
	 */
	public function setPrintAreaByColumnAndRow($column1, $row1, $column2, $row2, $index = 0, $method = self::SETPRINTRANGE_OVERWRITE) {
		return $this->setPrintArea(PHPExcel_Cell::stringFromColumnIndex($column1) . $row1 . ':' . PHPExcel_Cell::stringFromColumnIndex($column2) . $row2, $index, $method);
	}

	/**
	 * Add a new print area to the list of print areas
	 *
	 * @param    int $column1             Start Column for the print area
	 * @param    int $row1                Start Row for the print area
	 * @param    int $column2             End Column for the print area
	 * @param    int $row2                End Row for the print area
	 * @param    int $index               Identifier for a specific print area range allowing several ranges to be set
	 *                                    A positive index will insert after that indexed entry in the print areas list, while a
	 *                                    negative index will insert before the indexed entry.
	 *                                    Specifying an index value of 0, will always append the new print range at the end of the
	 *                                    list.
	 *                                    Print areas are numbered from 1
	 *
	 * @return    PHPExcel_Worksheet_PageSetup
	 * @throws    PHPExcel_Exception
	 */
	public function addPrintAreaByColumnAndRow($column1, $row1, $column2, $row2, $index = -1) {
		return $this->setPrintArea(PHPExcel_Cell::stringFromColumnIndex($column1) . $row1 . ':' . PHPExcel_Cell::stringFromColumnIndex($column2) . $row2, $index, self::SETPRINTRANGE_INSERT);
	}

	/**
	 * Get first page number
	 *
	 * @return int
	 */
	public function getFirstPageNumber() {
		return $this->_firstPageNumber;
	}

	/**
	 * Set first page number
	 *
	 * @param int $value
	 *
	 * @return PHPExcel_Worksheet_HeaderFooter
	 */
	public function setFirstPageNumber($value = null) {
		$this->_firstPageNumber = $value;

		return $this;
	}

	/**
	 * Reset first page number
	 *
	 * @return PHPExcel_Worksheet_HeaderFooter
	 */
	public function resetFirstPageNumber() {
		return $this->setFirstPageNumber(null);
	}

	/**
	 * Implement PHP __clone to create a deep clone, not just a shallow copy.
	 */
	public function __clone() {
		$vars = get_object_vars($this);
		foreach ($vars as $key => $value)
		{
			if (is_object($value))
			{
				$this->$key = clone $value;
			}
			else
			{
				$this->$key = $value;
			}
		}
	}
}
